タイトルまたは説明

1. Have passed many opening and closing tests, meeting safe application standards;

2. Bult-in pressure relief valve

3. Filled with high quality anti-icing hydraulic oil,

4. Door openning angle at **6º at your option;

5. *0ºStop device or non-stop device

6. With single closing speed adjusting valves at **6º~0ºto match different closing purposes;
7. General designed;
8. Adjustable axis is designed to install and adjust easily&precisely.